Alarm clock



sept. 4,' 192s. l1,466,843

P. s. LUTTRELM E1* AL ALARM CLOCK l Fuga July 1s. 1921 v 2 shishet 1 77M C. P05124- sept;y 4,- 1923. 1,466,843

P. S. L.UTTRELLI ET ALv ALARM CLOCK Filed July 18, 1921 2 Sheets-Sheet '2 LII i WITNESS INVENTUM #M 19ML .5" [cdre W loana. C. Pos/zelup ATTORNEYS v Patented Sept. 4, 17923.

PAUL s. LUTTRELL AND PAUL C. Bosnia,

AMERICAN rCLOCK CORPORATIOIWVJOF O CALIFORNIA.4

orl CA'KLAND, CALIFORNIA, AssIGNons y'ro AKLAND, CALIFORNIA, A ConPCnA'rIoN or ALARM CLOCK.

Application ledJuly-i, 1921. Serial No. 485,423.

To all whom t may concern Be it known thatwe, `PAUL S; LUT'IRELL I' and PAUL C. Rosina, `citizens of the United States, and residents of the city of Oakland, county of Alameda, StateV of California, have invented a new and useful Alarm Clock,` of which the following is a specification. This invention relates to improvements in clocks and more particularly to the alarm mechanism,l thereof. i y 1 It is one of the objects of the present invention to provideV in kan alarm clock, a mechanism that can beselectivcly set so that `an alarm will be sounded substantially at a predetermined minute of a givenI ordesired hour. i

Anotherobject of the invention is to pro-L vide a setting mechanism for an alarm clockVv in which separate hour and separatepminute dials are utilized entirely independent of the v front face dial of the clock. Itis, in this connection, an objectof the invention to provide for theA setting of the alarm mechanism with facility and accuracy, the alarm indicating dials being so `,rranged as to eliminate confusion and error.

The invention possesses other objects and features of advantage, some of whichvwith the foregoing, will be made manifest in the following description vof the preferredform of the invention, which is illustrated in the drawings accompanying and forming part of the specification. It is to beunderstood view of the cloClI-worland that it is notintended to 'limit theinvention to the embodiment shown by the said drawings and description, as variations may be adopted within Vthe scope ofthe'invention as set forth in the claims. j n

Fig. l is a perspective of a form of the improvedV clock showing the front usual dial and the-,alarm setting dials arranged indef pendently thereof. l

Fig. 2 is an elevation and diagrammatic combined alarm Vsetting mechanism. ,l ,j 1' Y l F ig.' 3 is a side' oredge'view of the Vworks looking toward the yalarm setting mechanism. i

Figa is a section of a fragment in avertical plane through the framework and loolr ing in thedirectionof .the inner end of the setting counter shafav.

F 5 is a front view. of the clock.

Fig. 6 is a rear view of the clock back.

Fig. 7 lis ardetail of the hammer driving train and the silencer. i

Fig. 8 is a plan view of the silencer as shown in Fig. 7.

The present invention embodies a set of Yalarm indicating dials vently of the main outer dial of the clock and with which indicating dials `therer are cooperative indicating pointers connected by a gear train including a main shaft'having provision whereby it may be manually op-V arranged independerated Iso as to set the indicating pointers to the vpredetermined position at whichr it 'is desirable tohave an alarm mechanism op`- erate to sound an alarm at a designated time. a Y ,j

`The invention may vbe incorporated in a clock structure in combination with any suitable clock mechanism which is arranged, in the present case, withinVr a suitable case 2, having a front outer dial 3.over which trav- Yerse vthe usual minute hand 4L and the hour hand. Suitahly located upon the casing 2, and in the present instance, on one side thereof, there is provided an alarm dial 6 graduated and indexed with minute numbers 7 and adjacent the minute dial Gis an hour dial 8. These dials may be arranged `in a countersunlrportion of the side of the casing 2 and from which projects a, main setting shaft l0, Fig. 2, having on its outer end alz'nurled'head or wheel l1. This wheel may be formed on a threaded socket part 12, to be screwed on tothe end of the main "shaft l() and carries a minute pointer 13 which is adapted to be turned clock-wise in frontof the minute dial 7, toga predetermined position. s Behind the dials 6-8 and inside of the 'casing 2 is provided a reduction train including 'av pinion 414 on the main shaft 10,

The` reduction train is so proportioned thatduring one rotation'of the main shaft 10, manipulated by the set- Vting wheel or head 11,'the counter shaft 17 turns but one-twelfth ofa revolution, thus enabling thersetting of the minute pointer 13 and the outer pointer 18 synchronouslyiv and to the desired minute and hour at which an alarm is required.

The clockwork may be ot the usual form and includes a central arbor 2O tor the minute hand 4 and is provided with a pinion 21, Fig. :2, driving a reduction train, terminating in an alarm cam gear 22, which is loosely and shiftably mounted on a setting spindle 23 journaled in the framework F in a position at right angles to and its axis intersecting the aXis ot the counter shaft 17, so that these shafts can be interconnected by suitable means. As here shown, the inner end of the counter shaft 17 is provided with a gear 17a meshing with a complementary geara of equal size so that the shat't 17 and the setting spindle 23 turn in unison when the main shaft is rotated.

One end ot the setting spindle 23 is pro vided with a collar 24 having a lug which is so disposed as to ride upon the end tace of an alarm cam 26 which is iixed on the alarm cam wheel 22. This wheel normally thrust toward the lug 25 to press the cam 26 against the lug by means commonly termed the let-ott lever Vdesignated 27, which is Secured to the t ameworl and has an inwardly turned end 28 designed to engage a' cut-out wire or lever '29 which is attached to a verge shaft 30 to which is secured a hammer wire 31, having on its outer end a hammer 32 designed to strilre a contiguous bell. arranged in or on the cloclr case r and not here shown,

The verge on the shaft 30 is designed to be oscillated by the usual i-'erge actuating escapement wheel 33 which is driven by power derived :trom an alarm spring 34 by the usual transmission gear train.

From the above it will be seen that during the operation oit the main clock works the alarm cam wheel Q2 will run with the rate of speed ot' the outer hand ot the clock and the alarm let-off 27 will cause the wheel with its cam Q6, to be snapped outwardly when the lug 25 oit the setting spindle 23 passes the reliet shoulder 26CL during the rotation ot the cam 2G. This permits the withdrawal of the let-oit lever end 28 and releases the cut-out lever or wire 29 and permits the verge mechanism to be actuated and throw the hammer 32 against the bell.

The operation ot the setting spindle to bring the lug 25 to a predetermined position is readily7 achieved by rotation oit' the main shaft 10 and by virtue ot the independent minute pointer 13 and the hour pointer 18, the parts can be set so. that the alarm will be caused to go off at practically a predetermined minute ot any hour.

It is, among other objects oit the invention, an object to provide means for insuring the release oit a silencing device that may be provided in combination with the clock tor the purpose of interrupting the operation of the alarm hammer which, unless it is impeded, will continue to vibrate until its driving spring has become entirely unwound.

Tt is further, in this connection, an object of the invention to provide a device which can be readily thrown to interrupt the operation ot the alarm mechanism. It is, turther, an object to provide means in connection with the silencing mechanism whereby the silencer will be rendered inoperative upon the striking mechanism as soon as an attempt is made to wind the alarm spring, This is ,tor the purpose of avoiding the danger ot leaving the silencing device in its effective position upon the alarm mecha nism, in which case there would be a failure to give the desired alarm when the given time had arrived.

To that end, a form ot silencer is here illustrated as comprising a resilient arm 40, one end oit which is secured. upon the tramework F of the clock and which is provided with an abutment 41 at its tree end which normally occupies a position out of the path ot movement of the hammer wire 31, when this is driven by the oscillation of: the verge arbor 30. The arm or silencing member is preferably of resilient material and may be in the form of a leat spring, its tree end normally being entirelyT clear ot the hammer wire 81 and the silencer 40 is adapted to be thrown to an outer or effective position so asto interrupt the operating hammer. For the purpose of so actuating the silencer member 40. there is mounted on the back B ot' the case 2 ot the clock a lever arm 44 which is adapted to rotate in a bearing 45 in such manner that the swinging end ott-he lever 44 at the back ot the clock will move into juxtaposition with the winding handle 34 of the usual alarm spring inside of the clock case. lhen thrown to such position, which is indicated in dotted lines, Fig. G, an arm 4G ot the lever 44 and which is inside oit the back B, moves into engagement with the contiguous swinging' or yielding end ot the silencer member 40 and this is sprung outwardly to the position indicated in dotted lines, Fig. 6, at which time the shoulder 41 of the silencer member moves into effective stopping position with respectl to the hammer wire 31 and it is thereby prevented :from continuing operation under the impulse ot its driving spring. Suitable means may be employed to temporarily hold the lever 44 in its ap plied or effective silencing position, and, as shown, the swinging end of the silencer member 40 is provided with a concave seat 40il to receive the contiguous end 46 of the silencing lever 44.Y

Atter the silencing device has been manipulated to interrupt the operation of the alarm, unless the alarinhammer is again released vfrom the silencing device, the alarm mechanism Will fail to operate at such predetermined time as the alarm hasy As it is customary for the at the desired time because the alarm silencer is disengaged coincidently with an attempt to Wind the-alarm spring.

What is `claimed is: l. An alarm clock provided With a front hour and minute dial and respective hands' for hour and minute indication in combination with a clock Works; and an alarm mechanism With synchronous hour and minute pointers, and a pair of alarm dials separate frornthe said front dial for the hour and minute alarm setting pointers. v

2. An alarm clock having, in combination,

' a front face dial and hour and minute hands Operative over the dial in the usual manner;

and an alarm setting mechanism including a setting main shaft extending through the casing at right angles to the face of the clock and having an indicating pointer, and an alarm dial 4over which said pointer is mov.

able; the said dial being arranged separately from the face dial, and a second alarm dial associated with the aforesaid alarm dial, and an indicating pointer movable over the second alarm dial.

3. An alarm cloclr having, in combination, a front face dial and hour and minute hands operative over the dial in the usual manner; and an alarm setting mechanism including a setting main shaft extending through the casing of the clock and having an indicating pointer, an alarm dial over which said pointer is movable; the said dial being arranged separately from the face dial, a second alarm dial associated with the aforesaid alarm dial` and an indicating pointer movable over the second alarm dial; the alarm. pointers being intergeared so that they are set synchronously when the main stem is actuated.

4. An alarm clock having, in combination, a casing with a face hour `and minute dial and a clock Works arranged in the casing and having hour and minute hands operative over the face dial, an alarm mechanism including a setting spindle upon which is rotatively and slidably mounted an alarm s cam Wheel which is driven by the clock Work; and means for actuating the setting spindle includingl a set of intergeared shafts,

each carrying a pointer for indicating minute and hour setting of the alarm mechanism.V A

5. An alarm clock having, in combination, a casing with a face hour and minute dial and a clock Works arranged in the casing and .having hour and minute hands operative over the face dial, an alarm mechanism including a setting spindle upon which is rotatively and slidably mounted `an 4alarm cam Wheel which is driven by the clock Work; means for actuating the'setting spindle including a set of intergeared shafts, each carrying a pointer for indicating minute and our setting of the alarm mechanism, and individual dials for the hour and minute Vpointers respectively.

`6. An alarm clock having, in combination, a casing with a face hour and minute dial' and a clock Works arranged in the cas- Y ing and having hour and minute hands operative over the face dial, an alarmmechanism including a setting spindle upon Which is rotatively and 'slidably mounted an alarm cam Wheel Which is driven by the clock Work; means for actuating the setting spindle including a set of intergeared shafts,

each carrying a pointer for indicating 'min-- ute and hour setting of the alarm mechanism, andindividual dials for the hour and 8. An alarm clock having, in combination,

an alarm mechanism, a silencer to interrupt the opertaion of the alarm mechanism and y means for tripping the silencer When the alarm mechanism is Wound, and engageable by the user Whenmanually Winding the said ,i mechanism.-

,and moved, the silencer setting means Will be tripped to Vrelease the silencer.

PAULy s; LUTTRELL. PAUL c. Roslin.

In testimony whereof, We have hereunto set our hands.

iio y 

